Electrically-heated tool.



J. S. HANSEN.

ELECTRICALLY HEATED TOOL.

APPLIGATION FILED MAY 7, 1908.

1,020,603. Patented Mar. 19, 1912.

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UNITED STATES PATENT OFFICE.

JOHN S. HANSEN, OF.IBROCKTON, MASSACHUSETTS, ASSIGNOR TO 0. MILLER TREE- ING MACHINE COMPANY, OF PORTLAND, MAINE, A CORPORATION OF MAINE.

ELECTRICALLY-HEATED TOOL.

I To, all 'whom it-may concern:

.heated tools and is herein disclosed embodied'in an electrically heated treeing iron for use in finishing boots and shoes.

Heretofore electrically heated treeing irons have been so constructed that. if the heating resistance becomes through short-circuiting, the iron is returned for repair to the factory where manufactured. This course of procedure has i been made necessary by thedifliculties incident to removing and replacing 'a heating resistance. An important object of the present invention is to provide 'ap electrically heated t-reeing iron in which the heating resistance may be 'readily/ removed and re placed. In the iron herein shown, this may be done without: disturbing the remaining electrical equipment of the iron. In irons of this class the conductors leading to and from Y the heating resistance are placed in the handle or handles with which the iron is provided. An important feature of thepresent invention consists in a treeing iron provided with a hollow body part and with one or.

more detachable handles extending from said part, and a heating resistance arranged within the body part and constructed to be removed from said part independently ofa handle. In the embodiment illustrated, the body part or ironing portion of the iron is provided with a detachable section covering an opening through which the heating resistance may be inserted and remoi ed. The

body part is provided with two handles leading from oppasite sides thereof.

The heating resistance, 'which is preferably of cylindrical shape, is providedwith contacts at its two ends, and electrical connection with these contacts is made through conductors leading from the exterior of the iron. The arrangement is such" thatthe heating resistance may be freely. removed and replaced without the manipulation of Specification of Letters Patent.

Application filed May 7, 1908. SerialNo. 431,359.

ineffective PatentedMar. 19, 1912.

electrical connections upon the iron. In the construction shown; the conductors are pressed yieldinglyinto engagement with. said contacts, but are not mechanically connected therewith and therefore do not interfere with removal of the resistance frombetween them.

In the iron shown, the handles are mounted upon stems attached to the body part of the iron, and are secured to said stems by having threaded engagement therewith. The conductors which pass through thehandles from the exterior are so arranged that they do not interfere with the rotary movement of the" handles upon their supporting stems in case, for example, such movement is desired to tighten the handles.

Other features of the invention will be hereinafter described and defined in the appended claims.

In the drawings,Figure 1 is a view in side elevation of a treeing iron constituting one embodiment of the invention; Fig. 2 is a view in longitudinal vertical section of a portion of the iron shown in Fig; 1; Fig. 3 is a transverse sectional yiew on the line 3.3

of Fig. 2.

Referring to the drawings, thereference numeral 2 indicates the body part of the iron which is provided upon its exterior with ironing. surfaces of the usual contour. The body part 2 is provided with an internal cavity containing a heating resistance 4. The heating resistance comprises a spool 6 upon which are. arranged alternately layers of insulating material such as mica, and coils of'resistance wire. It will be understood that the several concentrically arranged coils are formed of a continuous length of wire. The spool 6 contains at each end aplug'S of conducting material, such as brass, suitably insulated from the material of the spool. Each .plug 8 is provided with a laterally extending pin 10, said pins being connected respectively witlrthe two ends of the resistance wire., The spool is, formed with flanges 12 at its two ends. The body part of the iron is proyided upon its interior with transversely concave supporting ledges 14 upon which the resistance is seated, the flanges 12 resting upon said ledges. The up-. per side ofthe body part of the iron, as shown in Fig. 2, plate 16, forming approximately the entire upper side of'saidbody part. This plate is is formed by a removable secured to the body part of the iron by screws 18 arranged at opposite ends thereof. It will be understood-that the plate 16 constitutes a portion of the ironing surface of the iron. The plate 16 is provided upon its inner sides with transverselycurved lugs 20, which, in the operative position of the parts, bear upon the flanges 12 of the heating resistance and hold said resistance firmly upon the seat formed by the ledges let. It will be understood that the transverse curvature of the ledges 14 and lugs 20 is provided to cause them to fit the circular 'shape of the flanges 12. The flanges 12; are provided with beveled surfaces 21, which serve a, purpose hereinafter referred to. 7

Secured to each end of the body part2 of the iron'is a hollow stem 22, the outer end of which is externally threaded to retain in place thereon an exterior casing or handle 24: of wood. A shell 26 is arranged about the stem 22 in contact with the body part 2,

' and between said shell and the adjacent hanprovided with a flange dle 24 is arranged. insulation 28'and a metal washer 30. The inner edge of the washer is 32 which lies be tween the shell 26 and the stem 22. The inns r end of the wooden handle 24: is provided with a metal ferrule 3d. The shell 26 is preferably foraminatcd, as shown in Fig. 1, to lessen the conduction of heat from the body part of the iron to the handle.

In the outer end of each handle 24; is inserted a ring 36 of insulating material in which is received a thimble 38 arranged with its closed end outermost. The thimble 38, is screwed into the ring 36 and is provided with a threaded interior surface-to receive a tubular plug ll) within its inner open end.

A conductor 42 is supported within the plug '40 and is sustained at its inner end by amaterial.

tubular support 14 of suitable insulating The conductor 4-2 is headed at its outer end. Between its head and the end of the thimble 38 is arranged a spring e6. As will be apparentfrom-Fig. 2, in the operative position of the heating resistance, each spring 46 presses its conductor 42 against a plug 8 in the heating resistance. 'When the heating resistance is removed, longitudinal movement of the conductor 42 into thecavity of the iron is limited by engagement of its head with. the; tubular plug 4C0.

The outer parts of the thimbles 38 constitute exposed contacts which may be connected with the terminals of a dynamo or other supply system when desired, in order to complete the circuit and thereby heat the iron.

In the use of the treeing iron shown, the parts are normally in the position illustrated in Fig. 2, If theiron becomes inoperative through the presence of a short circuit in the heating resistance, the resistance may be removed by detaching the plate 16, and

roadeoe a new resistance may he iriserted. It will be seen that in this way the use of the iron is but momentarilv interfered with. In insorting the new resistance the conductors 42 engage the beveled surfaces 21 over which they ride into contact with the plugs 8. There is thus no adjustment or manipulation of .the conductors required in inserting or removing a heating resistance. After the insertion of the heating resistance the plate- 16 is secured in place and the resistance thus clamped in position within the cavity of the body part of the iron.

heating resistance removable independently of the handles, but the handles are capable of independent adjustment or removal. it will also be seen that the conductors e2 are soarranged that they do not interfere with the rotatory adjustment of the handles 2% in case this is desired in order to tighten the handles upon their supporting stems.

The operation of the specific tool shown is as follows :-()onnection is made in any suitable manner between the contacts .38 and the terminals'of a dynamo or other supply system, and the iron is allowed to become heated. When sufliciently hot it is removed from the circuit and applied in the proper manner to the shoe.

It will be understood that the invention is not limited to the particiilar construction shown, but that many modifications may b made in the construction and arrangement of the parts as well as in the general organization of the device without departing from the spirit of the invention.

vHaving described my invention, what I. claim as new and desire to secure by Let ters Patent of the United States is 1. A. treeing iron having a. holl0\v body part, a heating resistance arranged within said body part, handles extending from opposite sides of said part, the body part hav .ing an opening through which the resistance may be inserted or removed while the han dles are in their normal position and a. cover for said opening.

2. A treeing iron having a hollow body part provided with an opening intermediate its ends, a heating resistance removably supported in said part, handles extending from the ends of said part, a contact arranged. in an exposed position upon each of the han-v dles and electrical connect-ions leading from said contacts to the resistance.

- 3.v A treeing iron provided with a hollow body part and a heating resistance arranged within said part, a stem secured to said part, a handle rotatably adjustable upon said stem, a contact arranged in an exposed position upon the handle and a conductor leadingfrom said contact to the resistance and constructed to permit free rotatory, movement of the handle .upon said stem; 7

It will be observed that not only is the.

"masses in g an openmg intermediate of the handles through which said heating resistance may be removed. i m 5. A tracing iron provided witha hollow body part and with detachable handles'extending from said part?2 aheating resistance arranged within the ody part and constructed to be removed from saidpart independently of said handles, and meansfor holding said heating resistance in working position within said body part. 7

6. A treeing iron having an internal cavity and an opening leading into said cavity, a heating resistance within said cavity con.- structed to be inserted through said opening, said resistance having contact termirials, contacts projecting into the cavity to engage said terminals, and a cover for said opening constructed to retain the resistance in working position within said cavity.

7. In an electrically heated treeing iron the combination with a hollow body part and a heating resistance arranged within said body part, of a handle extending from said body part, a contact upon the outer end of the handle, a conductor in continuous electrical connection with. said contact arranged for movement longitudinally of the handle and formed to entertlie cavity of the body part and to have engagement with the heating resistance, and. means for pressing said conductor yieldingly into engagement with the resistance.

8. A treeing iron having a hollow body part, handles extending in opposite directions from said body part, conductors leading into said body part from opposite sides,

and a heating resistance within the cavity and formed to vthe body part, incans for pressing said of the body part constructed to be inserted between said conductors and'removed there from by movement transverse to the iron.

9. A treeing iron, having a hollow body said handles having -continuous electrical connection with thefcontacts arranged for movement longitudinally of the handles enter the cavity of conductors yieldingly toward the body-partand a heating resistance constructed to be P interposed between the ends of said conductors and provided with. inclined surfaces. formed to move the conductors outwardly I part, handles extending from. opposite sides of said body part, contacts arranged upon the ends of the handles, conductors within in the insertion of the resistance in working position within said cavity.

10. A treeing iron, having a hollow body part, conductors entering the cavity said body part from opposite sides,'a' heating re sistance provided 'with contact each end, means for removably sustaining the re sistance in working position between said conductors, and means for efi'ecting yielding engagement between theconductors and said contacts upon'the insertion of the resistance in working position.

11. A. treeing iron having a body part provided with an internalcavity, handles extending from opposite sides of said body part, a heating resistance removably sup ported in said cavity, contacts carried by said heating resistance and contacts ar ranged in said cavity tocooperate with the contacts on said resistance when it is in working position in theiron.

In testimony whereof'l have signed my name to this specification in the two subscribing witnesses.

JOHN S. HANSEN. -Witnesses:

ALLAN H. BARRows, ELIZABETH C. Coors.

presence of 

